A 4-cylinder, 4-stroke compression ignition engine has piston stroke of $10.5 \mathrm{~cm}$ and cylinder bore of $11 \mathrm{~cm} .$ At a mean piston speed of $7 \mathrm{~m} \mathrm{~s}^{-1},$ the developed brake mean effective pressure is $650 \mathrm{kPa}$. The brake power in $\mathrm{kW}$ developed by the engine is

(A) 39.40

(B) 43.24

(C) 86.48

(D) 172.96

A 4-cylinder, 4-stroke compression ignition engine has piston stroke of $10.5 \mathrm{~cm}$ and cylinder bore of $11 \mathrm{~cm} .$ At a mean piston speed of $7 \mathrm{~m} \mathrm{~s}^{-1},$ the developed brake mean effective pressure is $650 \mathrm{kPa}$. The brake power in $\mathrm{kW}$ developed by the engine is

(A) 39.40

(B) 43.24

(C) 86.48

(D) 172.96

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